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dc.date.accessioned 2010-11-30T13:13:44Z
dc.date.available 2010-11-30T03:00:00Z
dc.date.issued 2010
dc.identifier.uri http://sedici.unlp.edu.ar/handle/10915/16692
dc.description.abstract The "Paranaense Sea" (middle/upper Miocene) presents a clear marine gradient from the east to the west into the Chaco-Paraná Basin. To the west, diverse formations present paranaense's foraminifera together with groups of brackish or fresh-water macro and microfauna. In this region, the Santa María Group (Sierras Pampeanas, Tucumán and Catamarca provinces), includes two formations with thick lacustrine sequences, the San José Formation (middle Miocene) and the Chiquimil Formation (upper Miocene). Since the foraminifera discovery in this group in the1980s, the sedimentary rocks that hold them were in general assigned to the San José Formation, but without a precise stratigraphic control. The goals of the present work are the systematic identification of the foraminifera fauna, the stratigraphic identification into formational units of the layers that contain them and the exposure of hypotheses explaining the presence of foraminifera in lacustrine facies. Methodologically we made facial and systematic field sampling in outcrops of layers assigned as fertile in foraminifera, and we have also used samples supplied by YPF, extracted during the 1980s. From a total of 35 samples, 14 were positive containing foraminifera. Four samples correspond to the Chiquimil Formation with the following species: Ammonia parkinsoniana (d'Orbigny) and Lippsina demens (Bik) forma santamariana Zabert. It is noteworthy, in this formation, the joint presence of characids with Ammonia parkinsoniana (d'Orbigny) in the same stratigraphic level. Ten samples of the San José Formation gave the following species: Ammonia parkinsoniana (d'Orbigny) and Nonion sp. We conclude that both lacustrine formations of the Santa María Group hold a foraminiferal microfauna. The direct relationship of the lakes with the Paranense Sea or the possible foraminiferal sowing in the lakes by coastal birds migrations, are the two hypotheses that must be contrasted to explain the presence of foraminifera in the Santa María Group en
dc.language en es
dc.subject Foraminifera es
dc.subject Santa María Group (San José and Chiquimil Formations) es
dc.subject Miocene es
dc.subject Tucumán es
dc.subject Catamarca es
dc.subject Argentina es
dc.title The presence of foraminifera in lacustrine facies of the Santa María Group (San José and Chiquimil Formations), middle/upper Miocene, Tucumán and Catamarca, Argentina en
dc.type Objeto de conferencia es
sedici.identifier.isbn 978-987-95849-7-2 es
sedici.creator.person Gavriloff, Igor es
sedici.creator.person Arce, M. N. es
sedici.description.note Simposio VI: Microfósiles del Mesozoico y Cenozoico de América del Sur y Antártida. Nuevas aplicaciones y problemáticas asociadas es
sedici.subject.materias Ciencias Naturales es
sedici.subject.materias Paleontología es
sedici.description.fulltext true es
mods.originInfo.place Facultad de Ciencias Naturales y Museo es
sedici.subtype Resumen es
sedici.rights.license Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
sedici.rights.uri http://creativecommons.org/licenses/by-nc-sa/4.0/
sedici.date.exposure 2010
sedici.relation.event X Congreso Argentino de Paleontología y Bioestratigrafía y VII Congreso Latinoamericano de Paleontología (La Plata, 2010) es
sedici.description.peerReview peer-review es
sedici2003.identifier ARG-UNLP-DIS-0000000857 es
sedici.relation.isRelatedWith http://sedici.unlp.edu.ar/handle/10915/25738 es
sedici.relation.bookTitle X Congreso Argentino de Paleontología y Bioestratigrafía y VII Congreso Latinoamericano de Paleontología. Resúmenes es


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Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) Excepto donde se diga explícitamente, este item se publica bajo la siguiente licencia Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)